Different number of elements error

I have a matrix where I want to replace all values greater than 0 with those from another matrix. Both are 1X100, but I am getting the error "Unable to perform assignment because the left and right sides have a different number of elements." This is the code I have. Is there a better way to go about this?

FactoredAmplitude(FactoredAmplitude > 0) = CrackSkewAngle;

Answer 1

[KSSV]

FactoredAmplitude(FactoredAmplitude > 0) = CrackSkewAngle(FactoredAmplitude > 0);